CN102134110A - Low-pressure solar seawater desalination device using ejector - Google Patents
Low-pressure solar seawater desalination device using ejector Download PDFInfo
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- CN102134110A CN102134110A CN2009101975188A CN200910197518A CN102134110A CN 102134110 A CN102134110 A CN 102134110A CN 2009101975188 A CN2009101975188 A CN 2009101975188A CN 200910197518 A CN200910197518 A CN 200910197518A CN 102134110 A CN102134110 A CN 102134110A
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- seawater
- solar energy
- heat exchange
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- injector
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/124—Water desalination
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/124—Water desalination
- Y02A20/138—Water desalination using renewable energy
- Y02A20/142—Solar thermal; Photovoltaics
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/20—Controlling water pollution; Waste water treatment
- Y02A20/208—Off-grid powered water treatment
- Y02A20/212—Solar-powered wastewater sewage treatment, e.g. spray evaporation
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Abstract
A Low-pressure solar seawater desalination device using an ejector belongs to the technical fields of solar energy utilization and seawater desalination. In the device, solar energy is used as an auxiliary heat source; the self gravity of seawater is used to counteract the atmospheric pressure; the suction effect of the ejector is used to generate a negative pressure lower than the saturation pressure of seawater; the ejector is used to generate a temperature difference between seawater and condensed water steam; the condensation heat of water steam is recycled; the thin-wall arched structure where the heat exchanging wall ascends slowly in a thin-wall heat exchanging device is used to increase the heat conduction power and the heat exchange area; therefore the evaporation and the condensation are performed at a low temperature difference, and the COP of the ejector is greatly improved. The desalination process has low energy consumption and high fresh water yield, and the seawater desalination cost is reduced.
Description
Technical field
The present invention relates to a kind of solar energy collector that utilizes as thermal source, and adopt the low pressure sea water desalinating plant of injector.The high temperature heat conductive oil that this device utilizes solar energy collector to come out is heated by the fresh water that sea water by distillation generates sub-fraction, produce high-temperature vapor, enter injector, absorb the low-pressure water steam that generates by the seawater shwoot in the thin wall heat exchange device, eject the thermal source of the water vapour of comparatively high temps and pressure as thin wall heat exchange device, heating seawater wherein, while self condensation produces fresh water.The present invention utilizes renewable energy source to realize sea water desaltination, belongs to sun power utilization and field of sea water desalting technology.
Background technology
Human present whole Freshwater resources all derive from the precipitation of natural climate, and the earth has up to ten million square kilometres desert to be positioned at the shoreline, as the Middle East, and north African, Australia or the like, so huge flat-bottomed land is not because there is water can't become valuable arable land.If can realize cheap sea water desaltination, the mankind not only can solve the insufficient problem of ploughing, and can also solve CO by increasing vegetation
2The reduction of discharging problem.Weather effect could be really broken away from human development, development that can also the positive influence weather.
Simultaneously, in some landlocked salt water areas, and coastal, the island that lack natural drink water, utilize solar still to produce fresh water, be a kind of easy, feasible method.
The principle of work of common distillation desalination techniques is most of glass and the plastics oblique top lid of seeing through of sunlight that makes direct projection and scattering, inject the pond with the seawater heating evaporation, because the top cover outside surface is received the atmosphere cooling, temperature reduces, steam is relied on the power effect simultaneously for support fresh water is collected as product in the inboard condensation of top cover.Because the heat flow density of sun power is less, and the cooling power of natural air cooling is lower, cause evaporation and condensing rate low, limited fresh water yield, and the condensation latent heat that water vapor condensation is emitted wastes, can not recycle once more, be a kind of waste of energy.
Summary of the invention
The objective of the invention is to design a kind of low pressure solar energy sea water desalination apparatus that utilizes injector, change prior art and produce the low and low problem of capacity usage ratio of fresh water amount, the condensation latent heat that can fully recycle water vapor adds hot sea water, has improved fresh water yield.
A kind of low pressure solar energy sea water desalination apparatus that utilizes injector of the present invention's design comprises injector, thin wall heat exchange device, vapour generator, fresh water storage facilities, seawater degasifying device, solar energy collector, fresh-water flow pump, seawater flow pump, vacuum exhaust pump, pressure controlled valve and auxiliary condenser composition.Fresh water in the vapour generator is by the high temperature heat conductive oil ebuillition of heated from solar energy collector, produce high-temperature vapor and enter injector, acceleration and pressure decrease in injector, absorb the low pressure shwoot water vapor in the thin wall heat exchange device, eject the water vapour of comparatively high temps and pressure, enter in the thin wall heat exchange device, as thermal source heating seawater wherein, simultaneously self be condensed into liquid fresh water, enter the fresh water storage facilities.The surface tension effects of the seawater utilization liquid in the evaporator room of thin wall heat exchange device forms ultra-thin liquid film at the thin-walled arch heat exchange wall face that slowly rises, thereby reduces thermal resistance, significantly improves heat conduction power; Simultaneously, the water vapor that comes out from injector is in the condensing chamber condensation of thin wall heat exchange device, and water of condensation is discharged from thin-walled arch heat exchange wall face under the effect of surface tension and gravity.
Description of drawings
Fig. 1 is a structural representation of the present invention
Fig. 2 is a seawater degasifying device structural representation of the present invention
Fig. 3 is an evaporative condenser synoptic diagram of the present invention
Fig. 4 is a working process synoptic diagram of the present invention
The present invention is described in further detail below in conjunction with the drawings and specific embodiments.
Embodiment
Accompanying drawing is a kind of embodiment of the present invention.A kind of low pressure solar energy sea water desalination apparatus that utilizes injector mainly is made up of injector (1), thin wall heat exchange device (2), vapour generator (3), fresh water storage facilities (4), seawater degasifying device (5), solar energy collector (6), fresh-water flow pump (7), seawater flow pump (8), vacuum exhaust pump (9), pressure controlled valve (14) and auxiliary condenser (15). its structure is that the ejecting port of injector (1) is connected with the vaporization chamber outlet of thin wall heat exchange device (2); The outlet of injector (1) is connected with the entrance of thin wall heat exchange device (2) condensation chamber; Thin wall heat exchange device (2) condensation chamber steam (vapor) outlet links to each other with the entrance of pressure-control valve (14-a); The outlet of pressure-control valve (14-a) is connected with the steam side entrance of auxiliary condensing plant (15); Fresh water storage facilities (4) is led in the outlet of auxiliary condensing plant (15) steam side; Thin wall heat exchange device (2) condensation chamber water outlet leads to fresh water storage facilities (4); The outlet of seawater flow pump (8) is connected with thin wall heat exchange device (2) vaporization chamber entrance; The entrance of injector (1) is connected with pressure-control valve (14-b) outlet; Pressure-control valve (14-b) entrance is connected with the water side outlet of steam generator (3); The outlet of fresh-water flow pump (7) is connected with the water side entrance of steam generator (3); The inlet duct of fresh-water flow pump (7) inserts under the liquid level of fresh water storage facilities (4); The outlet of seawater depassing unit (5) is connected with the entrance of seawater flow pump (8); The entrance of vacuum exhaust pump (9) is connected with the low pressure Resolution Room of seawater depassing unit (5); The outlet of vacuum exhaust pump (9) links to each other with atmosphere; Seawater depassing unit (5) entrance inserts under the seawater liquid level of not desalination; Solar thermal collector (6) heat conducting oil pipe outlet is connected 3 with steam generator) the connection of conduction oil side entrance, the conduction oil side outlet of steam generator (3) is connected with solar thermal collector (6) heat conducting oil pipe entrance.
As Fig. 2 and shown in Figure 4, the seawater of normal temperature and pressure flows into the buck channel (10) of seawater degasifying device and carries out step-down, in low pressure Resolution Room (11), owing to reducing, pressure parses wherein non-condensable gasess such as carbon dioxide dissolved, oxygen, nitrogen, seawater after the degasification is admission passage (12) subsequently, and pumped into thin wall heat exchange device (2) by seawater flow pump (8), vacuum exhaust pump (9) by sensor senses low pressure Resolution Room (11) thus liquid level pilot-gas delivery flow, thereby the gaseous tension of low pressure Resolution Room (11) is remained on certain limit.
As shown in Figure 3 and Figure 4, after seawater after the degasification is pumped into the evaporator room of thin wall heat exchange device (2) by seawater flow pump (8), strengthen shwoot on the wall in the arch heat exchange, the pressure in the evaporator room of thin wall heat exchange device (2) is issued to or less than the saturation pressure of the temperature correspondence of seawater wherein in the suction of injector ejecting port.The injected device of the water vapour of shwoot (1) sucks from ejecting port, the high-temperature steam that enters with injector (1) inlet mixes, pass through supercharging subsequently by injector (1) outlet ejection, enter thin wall heat exchange device (2) condensation chamber, strengthen condensation on the wall in the arch heat exchange, liberated heat is used for heating the seawater of the evaporator room of thin wall heat exchange device (2), and condensed fresh water enters fresh water storage facilities (4).
As shown in Figure 4, unnecessary steam is discharged by pressure controlled valve (14-a) in thin wall heat exchange device (2) condensing chamber, enters to be condensed into fresh water in the auxiliary condenser and to enter fresh water storage facilities (4).
As shown in Figure 4, fresh-water flow pump (7) pumps into a certain amount of fresh water and enters vapour generator (3) from fresh water storage facilities (4), therein by high temperature heat conductive oil ebuillition of heated from solar energy collector (6), water vapour enters injector (1), advances step-down therein and quickens the back and mix from the flash steam of thin wall heat exchange device (2) evaporator room.The pressure of steam in pressure controlled valve (14-b) the control vapour generator (3), the fresh-water flow pump is according to fresh water liquid surface height controlling flow in the vapour generator (3).
Claims (8)
1. low pressure solar energy sea water desalination apparatus that utilizes injector, by injector; thin wall heat exchange device; vapour generator; the fresh water storage facilities; seawater degasifying device; solar energy collector; the fresh-water flow pump; the seawater flow pump; the vacuum exhaust pump; pressure controlled valve and auxiliary condenser are formed; it is characterized in that: the low-voltage vacuum of total system forms by the seawater deadweight; the fresh water in the vapour generator is produced high-temperature vapor by the high temperature heat conductive oil ebuillition of heated from solar energy collector and enters injector; acceleration and pressure decrease in injector; absorb the low pressure shwoot water vapor in the thin wall heat exchange device; eject the water vapour of comparatively high temps and pressure; enter in the thin wall heat exchange device; as thermal source heating seawater wherein, self be condensed into liquid fresh water simultaneously.
2. a kind of low pressure solar energy sea water desalination apparatus that utilizes injector according to claim 1, it is characterized in that: described thin wall heat exchange device is made up of evaporator room and condensing chamber, top is evaporator room, and the bottom is a condensing chamber, strengthens wall for the arch heat exchange between evaporator room and the condensing chamber.Seawater in the evaporator room is owing to capillaryly act on heat exchange and strengthen wall arch top and form ultrafine liquid film, thereby reduced the thermal conduction resistance by liquid film, improved heat conduction power.
3. according to claim 1 and 2 described a kind of low pressure solar energy sea water desalination apparatus that utilize injector, it is characterized in that: the evaporator room of described thin wall heat exchange device forms negative pressure under the sprayer pumps effect, its pressure is less than or equal to the wherein saturated pressure for vaporization of seawater temperature correspondence, thereby carries out the surperficial shwoot of seawater; And the condensing temperature of the pressure correspondence of the water vapour by injector pressurization ejection is higher than the temperature of seawater in the evaporator room.
4. according to claim 1 and 2 described a kind of low pressure solar energy sea water desalination apparatus that utilize injector, it is characterized in that: the lower surface of the arch heat exchange wall of described thin wall heat exchange device scribbles hydrophilic coating, reduces the infiltration angle of water of condensation.
5. a kind of low pressure solar energy sea water desalination apparatus that utilizes injector according to claim 1, it is characterized in that: described seawater degasifying device is the inverted U tubular construction, comprises buck channel, low pressure Resolution Room, supercharging flow pass.The vacuum exhaust pump is according to the tank level control gas flow of low pressure Resolution Room, and seawater carries out step-down through buck stage therein, and the low-pressure gas resolution phase is removed the non-condensable gases and the supercharging outflow stages such as carbonic acid gas, oxygen and nitrogen of melting in the seawater.
6. a kind of low pressure solar energy sea water desalination apparatus that utilizes injector according to claim 1 is characterized in that: described fresh-water flow pump is according to fresh water liquid level dominant discharge in the vapour generator.
7. a kind of low pressure solar energy sea water desalination apparatus that utilizes injector according to claim 1 is characterized in that: described solar energy collector adopts focus solar collector.
8. according to claim 1 and 2 described a kind of low pressure solar energy sea water desalination apparatus that utilize injector, it is characterized in that: described thin wall heat exchange device discharges superfluous water steam in the condensing chamber by pressure controlled valve, and through returning the fresh water storage facilities after the auxiliary condenser condensation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101975188A CN102134110A (en) | 2010-01-22 | 2010-01-22 | Low-pressure solar seawater desalination device using ejector |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101975188A CN102134110A (en) | 2010-01-22 | 2010-01-22 | Low-pressure solar seawater desalination device using ejector |
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| CN102134110A true CN102134110A (en) | 2011-07-27 |
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| CN2009101975188A Pending CN102134110A (en) | 2010-01-22 | 2010-01-22 | Low-pressure solar seawater desalination device using ejector |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109133236A (en) * | 2018-07-26 | 2019-01-04 | 东莞理工学院 | A kind of desalination plant and application method of industrial exhaust heat driving spray type refrigerating |
| CN110759408A (en) * | 2019-11-26 | 2020-02-07 | 安徽理工大学 | Sea water desalination method and device by liquid gravity distillation method |
| CN111099674A (en) * | 2019-12-29 | 2020-05-05 | 广州易能克科技有限公司 | Vacuum-pumping seawater desalination device |
| US10871972B2 (en) | 2017-03-21 | 2020-12-22 | JRD Communication (Shenzhen) Ltd. | Method for loading driver during terminal starting up and terminal device |
| CN113623545A (en) * | 2021-09-01 | 2021-11-09 | 房盼盼 | Novel pneumatic conveying device |
-
2010
- 2010-01-22 CN CN2009101975188A patent/CN102134110A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10871972B2 (en) | 2017-03-21 | 2020-12-22 | JRD Communication (Shenzhen) Ltd. | Method for loading driver during terminal starting up and terminal device |
| CN109133236A (en) * | 2018-07-26 | 2019-01-04 | 东莞理工学院 | A kind of desalination plant and application method of industrial exhaust heat driving spray type refrigerating |
| CN110759408A (en) * | 2019-11-26 | 2020-02-07 | 安徽理工大学 | Sea water desalination method and device by liquid gravity distillation method |
| CN111099674A (en) * | 2019-12-29 | 2020-05-05 | 广州易能克科技有限公司 | Vacuum-pumping seawater desalination device |
| CN113623545A (en) * | 2021-09-01 | 2021-11-09 | 房盼盼 | Novel pneumatic conveying device |
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Application publication date: 20110727 |